Unitech PA600 Programming Manual
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-8. Dynamic Load DLLCompiler would not load the DLL while use dynamic load DLL, it help user to load the DLL if it exists while theapplication executed. The follow is the example.Note: Even user does not need include the header and lib file but need to know the function definition.//////////////////////////////////////////////////////////////////////////////////////////HINSTANCE g_hUSIDLL;typedef BOOL (*lpfnUSI_GetScannerVersion)(LPTSTR model, LPTSTR firmware, LPTSTR sdk, int blen);lpfnUSI_GetScannerVersion USI_GetScannerVersion;g_hUSIDLL = LoadLibrary(L"\\Windows\\USI.dll");if (g_hUSIDLL != NULL){USI_GetScannerVersion = (lpfnUSI_GetScannerVersion)GetProcAddress(g_hUSIDLL,TEXT("USI_GetScannerVersion"));}else{MessageBox(_T("Load library USI.dll fail"), NULL, MB_OK);return;}TCHAR lstrmodel[50], lstrfirmware[50], lstrsdk[50];if (USI_GetScannerVersion != NULL)rc = USI_GetScannerVersion(lstrmodel, lstrfirmware, lstrsdk, sizeof(lstrmodel) + sizeof(lstrfirmware) +sizeof(lstrsdk));elseMessageBox(_T("USI_GetScanerVersion does not find"), NULL, MB_OK);if (g_hUSIDLL != NULL)FreeLibrary(g_hUSIDLL);////////////////////////////////////////////////////////////////////////////////////////// |
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